Plastic scintillator block as photon beam monitor for EGRET calibration

Details Plastic scintillator block as photon beam monitor for EGRET calibration Plastic scintillator block as photon beam monitor for EGRET calibration

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991itns...38..597l&link_type=abstract

(1990 Nuclear Science Symposium, Arlington, VA, Oct. 23-26, 1990, Proceedings. A91-42475 17-35) IEEE Transactions on Nuclear Sci

Physics

1

Gamma Ray Observatory, Gamma Ray Telescopes, Photon Beams, Scintillation Counters, Background Radiation, Bremsstrahlung, Calibrating, Monte Carlo Method

Scientific paper

The EGRET (Energetic Gamma Ray Experiment Telescope) detector has been calibrated at SLAC (Stanford Linear Accelerator) and, to a lesser degree, at the MIT Bates Linear Accelerator Center. To monitor the photon beams for the calibration, a plastic scintillator block, 5 cm x 5 cm in cross section, 15 cm in length, and viewed by a single photomultiplier tube, was used for the entire beam energy range of 15 MeV to 10 GeV. The design operation, and method of analysis of the beam intensity are presented. A mathematical framework has been developed to treat the general case of a beam with multiphoton beam pulses and with a background component. A procedure to deal with the fluctuations of the beam intensity over a data-taking period was also developed. The photon beam monitor is physically sturdy, electronically steady, simple to construct, and easy to operate. Its major merits lie in its sheer simplicity of construction and operation and in the wide energy range it can cover.

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